com.caucho.db.io

Interface StoreReadWrite

All Known Implementing Classes:

StoreReadWriteImpl, StoreReadWriteMmapNio

public interface StoreReadWrite

Filesystem access for a random-access store. The store is designed around a single writer thread and multiple reader threads. When possible, it uses mmap.

Field Summary

Fields

Modifier and Type	Field and Description
static int	FILE_SIZE_INCREMENT

Method Summary

Modifier and Type	Method and Description
void	close()
void	create()
void	fsync()
long	getChunkSize() Returns the alignment size for mmaps.
long	getFileSize() Returns the file size.
long	getMmapCloseTimeout()
void	init()
InStore	openRead(long offset, int size) Opens the underlying file to the database.
OutStore	openWrite(long offset, int size) Opens the underlying file to the database.

Field Detail

FILE_SIZE_INCREMENT

static final int FILE_SIZE_INCREMENT

See Also:

Constant Field Values

Method Detail

getFileSize

long getFileSize()

Returns the file size.

getChunkSize

long getChunkSize()

Returns the alignment size for mmaps.

getMmapCloseTimeout

long getMmapCloseTimeout()

create

void create()
     throws java.io.IOException

Throws:

java.io.IOException

init

void init()
   throws java.io.IOException

Throws:

java.io.IOException

openRead

InStore openRead(long offset,
                 int size)

Opens the underlying file to the database.

openWrite

OutStore openWrite(long offset,
                   int size)

Opens the underlying file to the database.

fsync

void fsync()

close

void close()